1 / 10

Integrated Modeling for Burning Plasmas

Integrated Modeling for Burning Plasmas. Introduction to the Session S. C. Jardin Princeton Plasma Physics Laboratory. Workshop (W60) on “Burning Plasma Physics and Simulation 4-5 July 2005, University Campus, Tarragona, Spain

nile
Download Presentation

Integrated Modeling for Burning Plasmas

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Integrated Modeling for Burning Plasmas Introduction to the Session S. C. Jardin Princeton Plasma Physics Laboratory Workshop (W60) on “Burning Plasma Physics and Simulation 4-5 July 2005, University Campus, Tarragona, Spain Under the Auspices of the IEA Large Tokamak Implementing Agreement

  2. Integrated Modeling for Burning Plasmas - Session topics - Review progress towards a comprehensive theory/model for burning plasmas in ITER/DEMO -including- • -particle distributions in velocity and space and -heating • Burning plasmas in optimized shear/hybrid scenarios, dynamic evolution and positional stability of ITBs, current profile alignment including bootstrap current evolution • Transient and bifurcative phenomena in burning plasmas (dynamics of L-H transitions and edge-core coupling, ITB formation and evolution, thermal stability in optimized shear/hybrid scenarios, including the approach to burning conditions with additional heating) • Impurity and helium ash accumulation (including impurity penetration through SOL, ETB and ITB) • More speculative issues, such as -channelling

  3. Progress towards a comprehensive theory/model for burning plasmas in ITER/DEMO • Whole Device Modeling Codes • Extended MHD and Energetic Particles • Turbulence Simulations • Edge-Plasma Integrated Modeling • RF, NBI, -particle, Impurities, and Fueling Sources

  4. What do we mean by a comprehensive theory/model for burning plasmas in ITER/DEMO? 5D Gyrokinetics Code 1½D Whole Device Modeling Code 3D Extended MHD Code Transport Module Full Wave RF Code MHD Module … -particle Module 5D Gyrokinetics Code + Edge Module 3D Extended MHD Code RF Modules 3D Extended MHD Code Equilibrium Module + Full Wave RF Code

  5. New initiatives now planned or underway • Japan: BPSI: ( TASK, TOPICS ) • EU: JET initiative (ASTRA, CRONOS, JETTO), Integrated Modeling Task Force • US: NTCC (modules library), PTRANSP (TSC/TRANSP + …), FSP (not yet begun) – (also BALDUR, ONETWO, CORSICA) • Need for more sophisticated modules in most areas • Turbulent Transport • Extended MHD and energetic particle effects • Scrape-off-layer, ELMs, and pedestal • Whole Device Modeling Codes • Integrated Modeling: • Detailed TSC/TRANSP transport and H&CD modeling and comparison with existing experimental details Kessel • Integrated TSC/TRANSP used to predict rotation, q-control, TAE activity, transport levels, NI-NBI sensitivity to aiming angle, ash accumulation, sensitivity to pedestal temperature: postprocess TAE prediction, Turbulence modeling with GYRO Budny

  6. Need to further develop 3D Nonlinear Extended MHD codes and validate on existing experiments. • Sawtooth: Full 3D nonlinear sawtooth simulation now possible for small tokamaks, not yet for ITER. Good semi-analytical models available (Porcelli model) • ELMs: Some progress (BOUT-Snyder, JOREK-Huysmans, NIMROD-Brennan, M3D-Strauss) Not yet a full 3D ELM simulation for even small tokamaks. Good semi-analytical models being developed. • NTMs: Not yet a full 3D NTM simulation. Modified Rutherford equation (semi-analytical) models widely used. • Resistive Wall Modes: Not yet a full 3D nonlinear model. • Locked Mode Threshold: Not yet a fundamental model • TAE: 3D Hybrid particle/fluid simulation model possible for short times and weakly nonlinear behavior…full nonlinear integration with thermal particles not yet possible. • Disruption Modeling: Axisymmetric modeling in fairly good shape, 3D modeling just beginning • Extended MHD and energetic Particles • Integrated Modeling: • MHD-based ELM model (MARG2D) coupled into TOPICs system Ozeki

  7. Focus is presently on core turbulence: ITG, ETG, ITG/ETG coupling, finite beta effects, transition from Bohm to gyro-Bohm, turbulence spreading • need to develop long-time (transport timescale) predictive simulation capability • turbulence and neoclassical simulation integration • mechanisms for transport barrier formation • pedestal region and core-edge simulation integration • how to couple with whole-device-modeling codes • impurities and helium ash transport • Turbulence Simulations • Integrated Modeling: • Gyrokinetic Turbulence  MHD , Wave Heating, Plasma Edge Lee

  8. Full 3D predictive edge model is lacking • Numerous edge codes exist to provide qualitative understanding and quantitative results for specific phenomena • edge transport: CSD, SONIC, UEDGE, … • kinetic edge turbulence: PARASOL, … • collisional edge turbulence: BOUT, … • Many issues remain: • L-H transition and pedestal physics • nonlinear ELM crash, transport, and pedestal recovery • density limit • material erosion including redeposition and dust formation • impurity transport • Edge-Plasma Integrated Modeling • Integrated Modeling: • Compatibility between impurity injection for a high edge radiation fraction and core fusion physics (confinement and fusion power) Takenaga • Integration of core, edge, PSI codes: neutrals, atomic physics, wall interaction, turbulence, transport, drifts, neoclassical effects Coster • Static and dynamic (with ELMs) semi-emperical pedestal models coupled to core transport: DIII-D, JET, and simulations for burning plasmas Kritz

  9. Comprehensive suites of RF and neutral beam codes exist • Integrated computations between full-wave ICRF and FP solvers are underway, but not yet in routine use • Integrated modeling that combines advanced ICRF antenna modules with full-wave solvers are underway • RF and NB source modules have been combined with WDM codes, but generally not the most advanced RF packages. • RF/FP Codes need to be coupled to MHD codes in order to simulate instability control • Modeling of Mode Conversion physics in ITER scale plasma not yet possible • RF, NBI, -particle, and fueling Sources • Integrated Modeling: • ICRH wave field  distribution function , MHD Hellsten • Interaction of -particles with LH by coupling SPOT and DELPHINE in CRONOS framework Schneider • RF-particles ion distribution function Fisch

  10. Schedule

More Related